/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License.  You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package org.apache.flink.streaming.connectors.kinesis.util;

import org.apache.flink.annotation.Internal;

/** Internal use. */
@Internal
public class TimeoutLatch {

    private final Object lock = new Object();
    private volatile boolean waiting;

    public void await(long timeout) throws InterruptedException {
        synchronized (lock) {
            waiting = true;
            lock.wait(timeout);
        }
    }

    public void trigger() {
        if (waiting) {
            synchronized (lock) {
                waiting = false;
                lock.notifyAll();
            }
        }
    }
}
